As it turned out, you can fit quite a lot into 3.5″ x 2.5″, more than I hoped to. If I planned a little more carefully, there would even be more space for the water at the bottom. Instead, I ran with the clouds first and fitted the rest into what little space remained. Morale: even for a tiny piece, start with thumbnails. I would love to do something with cloud reflections.
colored pencil on canvas, 3.5″ x 2.5″